Create extra-envs with pinned dependencies (infra)

[Hook25]

Description

Given the recent urwid debacle taking down our infra, its about time we take seriously source installs of Checkbox. Checkbox source IS part of our infra, it is not a development tool anymore. As such, the distribution of it must be fixed.

This is not the principled solution to the issue, this is, but I'm completely unable to make it work. For some reason, if dependencies are precisely (or loosely for that matter) pinned, snap builds for core18 and core20 stop working, I've tried and failed multiple iterations.

This introduces two new optional environments to install checkbox-ng and checkbox-support so that one can install them on demand with the pinned dependencies.

Resolved issues

Fixes: https://warthogs.atlassian.net/browse/CHECKBOX-1921

Documentation

Documented each pinning block what it is referring to.

Tests

Tox
Metabox run: link
snaps native: link
snaps cross: link

To test this locally

$ lxc launch ubuntu:(noble|jammy) tmp
# assuming we are in checkbox/
$ lxc file push -r . tmp/root/
$ lxc shell tmp
(lxc) $ apt update && apt install -qq -y python3 python3-venv
(lxc) $ python3 -m venv venv
(lxc) $ . venv/bin/activate
(lxc) (venv) $ cd checkbox/checkbox-ng
(lxc) (venv) $ pip install .[jammy_prod] # or noble_prod if you are on noble
(lxc) (venv) $ cd ../checkbox-support
(lxc) (venv) $ pip install .[jammy_prod] # or noble_prod if you are on noble

You should now have a full venv with all the dependencies as pinned in the pyproject.toml

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.54%. Comparing base (d1b0f88) to head (e461b9b).
⚠️ Report is 109 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1954      +/-   ##
==========================================
+ Coverage   50.52%   50.54%   +0.02%     
==========================================
  Files         384      384              
  Lines       41111    41112       +1     
  Branches     7531     7629      +98     
==========================================
+ Hits        20770    20782      +12     
+ Misses      19599    19586      -13     
- Partials      742      744       +2     

Flag	Coverage Δ
checkbox-ng	70.26% <ø> (ø)
checkbox-support	63.91% <ø> (+0.16%)	⬆️

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[fernando79513]

LGTM +1!
It seems that all the pipelines are passing and I was able to run checkbox locally on the container.